Compilare: user.cpp: In function ‘void lee(int, int, int (*)[105])’: user.cpp:18:13: warning: unused variable ‘j’ [-Wunused-variable] int i , j; ^ user.cpp: In function ‘int main()’: user.cpp:46:9: warning: ‘char* gets(char*)’ is deprecated [-Wdeprecated-declarations] gets(s + 1); ^~~~ In file included from /usr/include/c++/6/cstdio:42:0, from user.cpp:1: /usr/include/stdio.h:638:14: note: declared here extern char *gets (char *__s) __wur __attribute_deprecated__; ^~~~ user.cpp:46:19: warning: ‘char* gets(char*)’ is deprecated [-Wdeprecated-declarations] gets(s + 1); ^ In file included from /usr/include/c++/6/cstdio:42:0, from user.cpp:1: /usr/include/stdio.h:638:14: note: declared here extern char *gets (char *__s) __wur __attribute_deprecated__; ^~~~ user.cpp:40:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rj.in" , "r" , stdin); ^ user.cpp:41:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rj.out" , "w" , stdout); ^ user.cpp:43:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n" , &n , &m); ^ user.cpp:46:20: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s + 1); ^ user.cpp:65:27: warning: ‘yj’ may be used uninitialized in this function [-Wmaybe-uninitialized] lee(xj , yj , julieta); ^ user.cpp:65:27: warning: ‘xj’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:67:25: warning: ‘yr’ may be used uninitialized in this function [-Wmaybe-uninitialized] lee(xr , yr , romeo); ^ user.cpp:67:25: warning: ‘xr’ may be used uninitialized in this function [-Wmaybe-uninitialized] /tmp/ccV1vVf0.o: In function `main': user.cpp:(.text.startup+0x81): warning: the `gets' function is dangerous and should not be used.